Data processing method for analogue modelling experiment of hypergravity geological structure

A data processing method for an analogue modelling experiment of a hypergravity geological structure, comprising steps of:

• 1) performing two-dimensional photographing and three-dimensional elevation scanning with an analogue modelling experiment device with a curved model surface for the hypergravity geological structure, so as to collect initial elevation data and initial velocity field data;
• and
• 2) correcting the initial elevation data and the initial velocity field data to obtain corrected elevation data and corrected velocity field data;
• wherein the step 1) specifically adopts the analogue modelling experiment device of the hypergravity geological structure, wherein a deformation material (15) is placed on a curved table (2) of a centrifuge basket;
• a top surface of the curved table (2) is an arc-shaped cylindrical surface;
• a model frame (14) is placed on the curved table (2), and the deformation material (15) is place in an enclosed area of the model frame (14);
• an industrial camera or a three-dimensional scanner (16) is provided right above the curved table (2);
• during rotation of a centrifuge, the arc-shaped cylindrical surface of the curved table (2) on the centrifuge basket rotates around a rotation axis of the centrifuge;
• when the centrifuge rotates, trajectories of all parts of the arc-shaped cylindrical surface of the curved table (2) are on a same cylindrical surface with the rotation axis of the centrifuge as a central axis;
• the initial elevation data and the initial velocity field data are obtained by performing two-dimensional photographing and three-dimensional elevation scanning on a top surface of the deformation material (15) by the industrial camera or the three-dimensional scanner (16);
• wherein the analogue modelling experiment device comprises:
• a bottom plate (1) and the curved table (2);
• wherein the bottom plate (1) is placed on the centrifuge basket, and screw assemblies are provided on both sides of the bottom plate (1);
• each of the screw assemblies comprises:
• a screw rod (6), a slide rail (8), a diverter (5) and a screw rod supporter (7), wherein the screw rod (6) is parallel to the bottom plate (1);
• two ends of the screw rod (6) are supported and connected between the diverter (5) and the screw rod supporter (7);
• the diverter (5) and the screw rod supporter (7) are fixed on the bottom plate (1), and the slide rail (8) is fixed on the bottom plate (1) under the screw rod (6);
• a motor (3) is fixed on the bottom plate (1) and between same ends of the two screws (6);
• two output shafts are symmetrically arranged at both ends of the motor (3), which are connected to one ends of the two diverters (5) of the screw assemblies through corresponding transmission shafts (4), respectively;
• the other ends of the diverters (5) are connected to ends of the screw rods (6), respectively;
• a fixed baffle (9) is connected between the two screw rods (6) of the two screw assemblies;
• two end portions of the fixed baffle (9) are screwed with the screw rods (6), and a bottom of each end of the fixed baffle (9) is engaged with the slide rail (8);
• a slider (10) is connected to the bottom of each end of the fixed baffle (9) and is engaged with the slide rail (8);
• a detachable baffle (11) is mounted on a bottom portion of the fixed baffle (9), and a bottom end of the detachable baffle (11) is hinged with a swinging baffle (13) through a hinge (12);
• the curved table (2) is fixed at a center of the bottom plate (1), and the top surface of the curved table (2) is the arc-shaped cylindrical surface;
• a tangent direction of the arc-shaped cylindrical surface is parallel to the screw rod (6), and a generatrix direction of the of the arc-shaped cylindrical surface is parallel to the fixed baffle (9);
• when the centrifuge rotates, the trajectories of all the parts of the arc-shaped cylindrical surface of the curved table (2) are on the same cylindrical surface with the rotation axis of the centrifuge as the central axis;
• the swinging baffle (13) is made of a flexible material, which covers and contacts with the arc-shaped cylindrical surface of the curved table (2).